./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 19:07:48,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 19:07:48,377 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 19:07:48,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 19:07:48,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 19:07:48,439 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 19:07:48,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 19:07:48,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 19:07:48,442 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 19:07:48,444 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 19:07:48,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 19:07:48,445 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 19:07:48,446 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 19:07:48,446 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 19:07:48,447 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 19:07:48,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 19:07:48,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 19:07:48,448 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 19:07:48,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 19:07:48,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 19:07:48,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 19:07:48,453 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 19:07:48,454 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 19:07:48,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 19:07:48,458 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 19:07:48,458 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 19:07:48,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 19:07:48,459 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 19:07:48,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 19:07:48,459 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 19:07:48,460 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 19:07:48,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 19:07:48,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 19:07:48,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 19:07:48,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 19:07:48,461 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 19:07:48,462 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 19:07:48,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 19:07:48,462 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 19:07:48,462 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 19:07:48,463 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 19:07:48,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 19:07:48,466 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2024-11-08 19:07:48,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 19:07:48,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 19:07:48,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 19:07:48,844 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 19:07:48,845 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 19:07:48,846 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/loops-crafted-1/in-de41.c Unable to find full path for "g++" [2024-11-08 19:07:51,200 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 19:07:51,457 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 19:07:51,457 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/sv-benchmarks/c/loops-crafted-1/in-de41.c [2024-11-08 19:07:51,467 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/data/f93dca229/a66d40306898483cacd44bab02f979ca/FLAG4495b9d09 [2024-11-08 19:07:51,772 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/data/f93dca229/a66d40306898483cacd44bab02f979ca [2024-11-08 19:07:51,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 19:07:51,777 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 19:07:51,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 19:07:51,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 19:07:51,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 19:07:51,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 07:07:51" (1/1) ... [2024-11-08 19:07:51,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a26a936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:51, skipping insertion in model container [2024-11-08 19:07:51,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 07:07:51" (1/1) ... [2024-11-08 19:07:51,818 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 19:07:52,043 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2024-11-08 19:07:52,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 19:07:52,076 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 19:07:52,090 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2024-11-08 19:07:52,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 19:07:52,126 INFO L204 MainTranslator]: Completed translation [2024-11-08 19:07:52,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52 WrapperNode [2024-11-08 19:07:52,127 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 19:07:52,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 19:07:52,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 19:07:52,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 19:07:52,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,178 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2024-11-08 19:07:52,179 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 19:07:52,180 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 19:07:52,180 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 19:07:52,180 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 19:07:52,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,197 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,219 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-08 19:07:52,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,228 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,233 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,235 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 19:07:52,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 19:07:52,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 19:07:52,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 19:07:52,242 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (1/1) ... [2024-11-08 19:07:52,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 19:07:52,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:07:52,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 19:07:52,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 19:07:52,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 19:07:52,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 19:07:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 19:07:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 19:07:52,393 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 19:07:52,395 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 19:07:52,597 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-08 19:07:52,597 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 19:07:52,618 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 19:07:52,618 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 19:07:52,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 07:07:52 BoogieIcfgContainer [2024-11-08 19:07:52,619 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 19:07:52,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 19:07:52,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 19:07:52,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 19:07:52,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 07:07:51" (1/3) ... [2024-11-08 19:07:52,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b046337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 07:07:52, skipping insertion in model container [2024-11-08 19:07:52,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 07:07:52" (2/3) ... [2024-11-08 19:07:52,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b046337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 07:07:52, skipping insertion in model container [2024-11-08 19:07:52,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 07:07:52" (3/3) ... [2024-11-08 19:07:52,640 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2024-11-08 19:07:52,674 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 19:07:52,675 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 19:07:52,795 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 19:07:52,808 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@815d0e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 19:07:52,809 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 19:07:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 19:07:52,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:07:52,832 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:07:52,833 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:07:52,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:07:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1272466132, now seen corresponding path program 1 times [2024-11-08 19:07:52,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:07:52,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47363079] [2024-11-08 19:07:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:52,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:07:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:07:53,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:07:53,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47363079] [2024-11-08 19:07:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47363079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:07:53,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:07:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 19:07:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906839717] [2024-11-08 19:07:53,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:07:53,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 19:07:53,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:07:53,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 19:07:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:07:53,932 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:07:54,111 INFO L93 Difference]: Finished difference Result 45 states and 69 transitions. [2024-11-08 19:07:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 19:07:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 19:07:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:07:54,125 INFO L225 Difference]: With dead ends: 45 [2024-11-08 19:07:54,125 INFO L226 Difference]: Without dead ends: 25 [2024-11-08 19:07:54,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 19:07:54,133 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:07:54,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 19:07:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-08 19:07:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-08 19:07:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2024-11-08 19:07:54,188 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 10 [2024-11-08 19:07:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:07:54,190 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2024-11-08 19:07:54,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2024-11-08 19:07:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 19:07:54,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:07:54,192 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:07:54,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 19:07:54,193 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:07:54,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:07:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1084190247, now seen corresponding path program 1 times [2024-11-08 19:07:54,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:07:54,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568134639] [2024-11-08 19:07:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:54,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:07:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:07:54,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:07:54,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568134639] [2024-11-08 19:07:54,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568134639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:07:54,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11135603] [2024-11-08 19:07:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:07:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:07:54,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:07:54,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 19:07:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:54,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 19:07:54,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:07:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:07:54,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:07:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:07:54,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11135603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:07:54,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:07:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-08 19:07:54,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515207712] [2024-11-08 19:07:54,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:07:54,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 19:07:54,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:07:54,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 19:07:54,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-08 19:07:54,631 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:07:54,998 INFO L93 Difference]: Finished difference Result 77 states and 124 transitions. [2024-11-08 19:07:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 19:07:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 19:07:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:07:55,001 INFO L225 Difference]: With dead ends: 77 [2024-11-08 19:07:55,001 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 19:07:55,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-08 19:07:55,005 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 19:07:55,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 73 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 19:07:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 19:07:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2024-11-08 19:07:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2024-11-08 19:07:55,028 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 12 [2024-11-08 19:07:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:07:55,028 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2024-11-08 19:07:55,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2024-11-08 19:07:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 19:07:55,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:07:55,030 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:07:55,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 19:07:55,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-08 19:07:55,236 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:07:55,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:07:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash -689585762, now seen corresponding path program 1 times [2024-11-08 19:07:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:07:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625512223] [2024-11-08 19:07:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:07:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:07:55,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:07:55,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625512223] [2024-11-08 19:07:55,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625512223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 19:07:55,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 19:07:55,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 19:07:55,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478281331] [2024-11-08 19:07:55,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 19:07:55,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:07:55,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:07:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:07:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:07:55,395 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:07:55,450 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2024-11-08 19:07:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 19:07:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 19:07:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:07:55,454 INFO L225 Difference]: With dead ends: 48 [2024-11-08 19:07:55,454 INFO L226 Difference]: Without dead ends: 35 [2024-11-08 19:07:55,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:07:55,459 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 19:07:55,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 19:07:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-08 19:07:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-08 19:07:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2024-11-08 19:07:55,474 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 14 [2024-11-08 19:07:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:07:55,475 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2024-11-08 19:07:55,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2024-11-08 19:07:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 19:07:55,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:07:55,476 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:07:55,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 19:07:55,477 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:07:55,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:07:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1305380839, now seen corresponding path program 1 times [2024-11-08 19:07:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:07:55,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168480297] [2024-11-08 19:07:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:55,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:07:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:07:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:07:55,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168480297] [2024-11-08 19:07:55,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168480297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:07:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423621629] [2024-11-08 19:07:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:55,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:07:55,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:07:55,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:07:55,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 19:07:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:55,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 19:07:55,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:07:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:07:55,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:07:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:07:55,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423621629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:07:55,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:07:55,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-08 19:07:55,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382428388] [2024-11-08 19:07:55,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:07:55,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:07:55,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:07:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:07:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:07:55,957 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:07:56,037 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2024-11-08 19:07:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 19:07:56,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 19:07:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:07:56,042 INFO L225 Difference]: With dead ends: 79 [2024-11-08 19:07:56,042 INFO L226 Difference]: Without dead ends: 56 [2024-11-08 19:07:56,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 19:07:56,045 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:07:56,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 19:07:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-08 19:07:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2024-11-08 19:07:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2024-11-08 19:07:56,064 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 16 [2024-11-08 19:07:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:07:56,064 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2024-11-08 19:07:56,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2024-11-08 19:07:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 19:07:56,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:07:56,066 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:07:56,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 19:07:56,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:07:56,267 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:07:56,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:07:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1522308968, now seen corresponding path program 2 times [2024-11-08 19:07:56,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:07:56,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099773194] [2024-11-08 19:07:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:56,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:07:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:07:56,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:07:56,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099773194] [2024-11-08 19:07:56,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099773194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:07:56,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018686847] [2024-11-08 19:07:56,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:07:56,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:07:56,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:07:56,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:07:56,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 19:07:56,567 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:07:56,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:07:56,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 19:07:56,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:07:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:07:56,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:07:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:07:56,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018686847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:07:56,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:07:56,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-08 19:07:56,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973086993] [2024-11-08 19:07:56,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:07:56,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 19:07:56,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:07:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 19:07:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-08 19:07:56,810 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:07:58,029 INFO L93 Difference]: Finished difference Result 191 states and 269 transitions. [2024-11-08 19:07:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 19:07:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 19:07:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:07:58,032 INFO L225 Difference]: With dead ends: 191 [2024-11-08 19:07:58,032 INFO L226 Difference]: Without dead ends: 180 [2024-11-08 19:07:58,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-11-08 19:07:58,036 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 232 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 19:07:58,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 211 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 19:07:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-08 19:07:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 88. [2024-11-08 19:07:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 87 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2024-11-08 19:07:58,078 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 18 [2024-11-08 19:07:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:07:58,078 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2024-11-08 19:07:58,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2024-11-08 19:07:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 19:07:58,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:07:58,082 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:07:58,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 19:07:58,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:07:58,283 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:07:58,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:07:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1812435522, now seen corresponding path program 2 times [2024-11-08 19:07:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:07:58,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789378006] [2024-11-08 19:07:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:58,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:07:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:07:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:07:58,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:07:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789378006] [2024-11-08 19:07:58,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789378006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:07:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625867265] [2024-11-08 19:07:58,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:07:58,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:07:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:07:58,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:07:58,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 19:07:58,465 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:07:58,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:07:58,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 19:07:58,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:07:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:07:58,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:07:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:07:58,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625867265] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:07:58,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:07:58,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-08 19:07:58,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825711282] [2024-11-08 19:07:58,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:07:58,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 19:07:58,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:07:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 19:07:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-08 19:07:58,686 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:07:59,376 INFO L93 Difference]: Finished difference Result 177 states and 215 transitions. [2024-11-08 19:07:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 19:07:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 19:07:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:07:59,378 INFO L225 Difference]: With dead ends: 177 [2024-11-08 19:07:59,378 INFO L226 Difference]: Without dead ends: 156 [2024-11-08 19:07:59,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2024-11-08 19:07:59,380 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 19:07:59,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 153 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 19:07:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-08 19:07:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 88. [2024-11-08 19:07:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-11-08 19:07:59,436 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 18 [2024-11-08 19:07:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:07:59,436 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-11-08 19:07:59,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:07:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-11-08 19:07:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 19:07:59,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:07:59,438 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:07:59,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 19:07:59,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:07:59,643 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:07:59,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:07:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -544786050, now seen corresponding path program 1 times [2024-11-08 19:07:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:07:59,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551861415] [2024-11-08 19:07:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:07:59,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:07:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:08:00,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:00,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551861415] [2024-11-08 19:08:00,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551861415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:00,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607816583] [2024-11-08 19:08:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:00,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:00,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:00,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:00,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 19:08:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:00,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 19:08:00,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:00,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 19:08:00,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607816583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:00,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:00,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-08 19:08:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895135414] [2024-11-08 19:08:00,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:00,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 19:08:00,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 19:08:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-08 19:08:00,665 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:01,216 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2024-11-08 19:08:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 19:08:01,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 19:08:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:01,218 INFO L225 Difference]: With dead ends: 113 [2024-11-08 19:08:01,218 INFO L226 Difference]: Without dead ends: 108 [2024-11-08 19:08:01,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-11-08 19:08:01,220 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:01,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 81 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 19:08:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-08 19:08:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2024-11-08 19:08:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2024-11-08 19:08:01,255 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 18 [2024-11-08 19:08:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:01,256 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2024-11-08 19:08:01,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2024-11-08 19:08:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 19:08:01,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:01,258 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:01,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 19:08:01,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:01,462 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:01,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash 242365859, now seen corresponding path program 2 times [2024-11-08 19:08:01,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:01,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459128586] [2024-11-08 19:08:01,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:01,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:01,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:01,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459128586] [2024-11-08 19:08:01,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459128586] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:01,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061587622] [2024-11-08 19:08:01,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:08:01,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:01,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:01,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:01,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 19:08:01,679 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:08:01,679 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:01,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 19:08:01,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:01,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:01,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061587622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:01,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:01,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-08 19:08:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314877884] [2024-11-08 19:08:01,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:01,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 19:08:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 19:08:01,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:08:01,769 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:01,826 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2024-11-08 19:08:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 19:08:01,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-08 19:08:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:01,828 INFO L225 Difference]: With dead ends: 112 [2024-11-08 19:08:01,828 INFO L226 Difference]: Without dead ends: 94 [2024-11-08 19:08:01,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 19:08:01,829 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:01,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 19:08:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-08 19:08:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2024-11-08 19:08:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-11-08 19:08:01,855 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 20 [2024-11-08 19:08:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:01,855 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-11-08 19:08:01,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-11-08 19:08:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 19:08:01,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:01,856 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:01,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 19:08:02,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-08 19:08:02,061 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:02,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash -302851938, now seen corresponding path program 3 times [2024-11-08 19:08:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:02,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854980279] [2024-11-08 19:08:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:02,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854980279] [2024-11-08 19:08:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854980279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117827826] [2024-11-08 19:08:02,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 19:08:02,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:02,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:02,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:02,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 19:08:02,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 19:08:02,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:02,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 19:08:02,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:02,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:02,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117827826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:02,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:02,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2024-11-08 19:08:02,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136129216] [2024-11-08 19:08:02,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:02,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 19:08:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 19:08:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-08 19:08:02,565 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:02,714 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2024-11-08 19:08:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 19:08:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 19:08:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:02,716 INFO L225 Difference]: With dead ends: 124 [2024-11-08 19:08:02,716 INFO L226 Difference]: Without dead ends: 120 [2024-11-08 19:08:02,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-08 19:08:02,717 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:02,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 19:08:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-08 19:08:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2024-11-08 19:08:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 110 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2024-11-08 19:08:02,777 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 22 [2024-11-08 19:08:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:02,777 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2024-11-08 19:08:02,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2024-11-08 19:08:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 19:08:02,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:02,780 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:02,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:02,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:02,984 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:02,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1771984515, now seen corresponding path program 4 times [2024-11-08 19:08:02,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:02,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124981429] [2024-11-08 19:08:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:02,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124981429] [2024-11-08 19:08:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124981429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552780734] [2024-11-08 19:08:03,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 19:08:03,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:03,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:03,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 19:08:03,226 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 19:08:03,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:03,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 19:08:03,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:03,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:03,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552780734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:03,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:03,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2024-11-08 19:08:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411239527] [2024-11-08 19:08:03,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:03,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 19:08:03,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 19:08:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-08 19:08:03,522 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:05,637 INFO L93 Difference]: Finished difference Result 298 states and 364 transitions. [2024-11-08 19:08:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 19:08:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-08 19:08:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:05,640 INFO L225 Difference]: With dead ends: 298 [2024-11-08 19:08:05,640 INFO L226 Difference]: Without dead ends: 256 [2024-11-08 19:08:05,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2024-11-08 19:08:05,643 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 304 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:05,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 203 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 19:08:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-08 19:08:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2024-11-08 19:08:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.233644859813084) internal successors, (132), 107 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2024-11-08 19:08:05,678 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 24 [2024-11-08 19:08:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:05,678 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2024-11-08 19:08:05,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2024-11-08 19:08:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 19:08:05,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:05,680 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:05,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 19:08:05,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 19:08:05,884 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:05,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash -756043246, now seen corresponding path program 3 times [2024-11-08 19:08:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:05,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642341619] [2024-11-08 19:08:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:06,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:06,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642341619] [2024-11-08 19:08:06,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642341619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:06,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057554969] [2024-11-08 19:08:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 19:08:06,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:06,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:06,066 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:06,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 19:08:06,146 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-08 19:08:06,146 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:06,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 19:08:06,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:06,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:06,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057554969] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:06,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:06,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-08 19:08:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458441151] [2024-11-08 19:08:06,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:06,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 19:08:06,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 19:08:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-08 19:08:06,424 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:09,330 INFO L93 Difference]: Finished difference Result 329 states and 432 transitions. [2024-11-08 19:08:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-08 19:08:09,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 19:08:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:09,333 INFO L225 Difference]: With dead ends: 329 [2024-11-08 19:08:09,333 INFO L226 Difference]: Without dead ends: 307 [2024-11-08 19:08:09,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1193, Invalid=3363, Unknown=0, NotChecked=0, Total=4556 [2024-11-08 19:08:09,336 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 428 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:09,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 344 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 19:08:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-08 19:08:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 132. [2024-11-08 19:08:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2366412213740459) internal successors, (162), 131 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2024-11-08 19:08:09,382 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 26 [2024-11-08 19:08:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:09,382 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2024-11-08 19:08:09,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2024-11-08 19:08:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 19:08:09,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:09,384 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:09,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:09,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 19:08:09,585 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:09,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:09,585 INFO L85 PathProgramCache]: Analyzing trace with hash -774517848, now seen corresponding path program 4 times [2024-11-08 19:08:09,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:09,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951451776] [2024-11-08 19:08:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:09,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:10,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:10,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951451776] [2024-11-08 19:08:10,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951451776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:10,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70479442] [2024-11-08 19:08:10,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 19:08:10,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:10,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:10,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:10,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 19:08:10,402 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 19:08:10,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:10,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 19:08:10,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:11,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:12,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70479442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:12,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:12,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 14] total 31 [2024-11-08 19:08:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884658041] [2024-11-08 19:08:12,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:12,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 19:08:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 19:08:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2024-11-08 19:08:12,342 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:14,537 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2024-11-08 19:08:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-08 19:08:14,538 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 19:08:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:14,539 INFO L225 Difference]: With dead ends: 173 [2024-11-08 19:08:14,539 INFO L226 Difference]: Without dead ends: 149 [2024-11-08 19:08:14,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=499, Invalid=1853, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 19:08:14,541 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:14,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 92 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 19:08:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-08 19:08:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2024-11-08 19:08:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.25) internal successors, (150), 120 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 150 transitions. [2024-11-08 19:08:14,564 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 150 transitions. Word has length 26 [2024-11-08 19:08:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:14,564 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 150 transitions. [2024-11-08 19:08:14,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 150 transitions. [2024-11-08 19:08:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 19:08:14,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:14,565 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:14,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:14,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 19:08:14,766 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:14,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash 93994083, now seen corresponding path program 5 times [2024-11-08 19:08:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:14,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857826913] [2024-11-08 19:08:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 19:08:15,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:15,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857826913] [2024-11-08 19:08:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857826913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138969916] [2024-11-08 19:08:15,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 19:08:15,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:15,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:15,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:15,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 19:08:15,280 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 19:08:15,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:15,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 19:08:15,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 19:08:15,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 19:08:15,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138969916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:15,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:15,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 12 [2024-11-08 19:08:15,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130394623] [2024-11-08 19:08:15,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:15,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 19:08:15,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 19:08:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-08 19:08:15,495 INFO L87 Difference]: Start difference. First operand 121 states and 150 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:15,673 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2024-11-08 19:08:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 19:08:15,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-08 19:08:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:15,675 INFO L225 Difference]: With dead ends: 163 [2024-11-08 19:08:15,675 INFO L226 Difference]: Without dead ends: 159 [2024-11-08 19:08:15,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-08 19:08:15,676 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:15,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 19:08:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-08 19:08:15,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 144. [2024-11-08 19:08:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 143 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2024-11-08 19:08:15,726 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 28 [2024-11-08 19:08:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:15,726 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2024-11-08 19:08:15,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2024-11-08 19:08:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 19:08:15,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:15,728 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:15,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:15,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:15,932 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:15,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1969689224, now seen corresponding path program 6 times [2024-11-08 19:08:15,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:15,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142774324] [2024-11-08 19:08:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:15,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 19:08:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142774324] [2024-11-08 19:08:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142774324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815583894] [2024-11-08 19:08:16,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 19:08:16,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:16,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:16,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:16,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 19:08:16,220 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 19:08:16,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:16,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 19:08:16,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 19:08:16,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 19:08:16,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815583894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:16,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:16,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-11-08 19:08:16,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910731705] [2024-11-08 19:08:16,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:16,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 19:08:16,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:16,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 19:08:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-11-08 19:08:16,670 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:17,547 INFO L93 Difference]: Finished difference Result 282 states and 352 transitions. [2024-11-08 19:08:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-08 19:08:17,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-08 19:08:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:17,550 INFO L225 Difference]: With dead ends: 282 [2024-11-08 19:08:17,550 INFO L226 Difference]: Without dead ends: 259 [2024-11-08 19:08:17,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2024-11-08 19:08:17,552 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 132 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:17,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 228 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 19:08:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-08 19:08:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 206. [2024-11-08 19:08:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.248780487804878) internal successors, (256), 205 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 256 transitions. [2024-11-08 19:08:17,644 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 256 transitions. Word has length 30 [2024-11-08 19:08:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:17,644 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 256 transitions. [2024-11-08 19:08:17,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 256 transitions. [2024-11-08 19:08:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 19:08:17,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:17,646 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:17,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:17,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 19:08:17,850 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:17,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1394913099, now seen corresponding path program 3 times [2024-11-08 19:08:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:17,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248128266] [2024-11-08 19:08:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:18,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:18,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248128266] [2024-11-08 19:08:18,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248128266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:18,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732027136] [2024-11-08 19:08:18,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 19:08:18,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:18,147 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:18,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 19:08:18,233 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-08 19:08:18,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:18,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 19:08:18,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:18,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:18,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732027136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:18,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:18,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-11-08 19:08:18,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356293751] [2024-11-08 19:08:18,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:18,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 19:08:18,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 19:08:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-11-08 19:08:18,737 INFO L87 Difference]: Start difference. First operand 206 states and 256 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:25,516 INFO L93 Difference]: Finished difference Result 922 states and 1264 transitions. [2024-11-08 19:08:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-08 19:08:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-08 19:08:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:25,531 INFO L225 Difference]: With dead ends: 922 [2024-11-08 19:08:25,531 INFO L226 Difference]: Without dead ends: 890 [2024-11-08 19:08:25,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1575, Invalid=3537, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 19:08:25,534 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 1401 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:25,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 888 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-08 19:08:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2024-11-08 19:08:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 284. [2024-11-08 19:08:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.243816254416961) internal successors, (352), 283 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 352 transitions. [2024-11-08 19:08:25,648 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 352 transitions. Word has length 32 [2024-11-08 19:08:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:25,648 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 352 transitions. [2024-11-08 19:08:25,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 352 transitions. [2024-11-08 19:08:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 19:08:25,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:25,649 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:25,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:25,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 19:08:25,850 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:25,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash 12153704, now seen corresponding path program 7 times [2024-11-08 19:08:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:25,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639396955] [2024-11-08 19:08:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:25,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 19:08:26,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:26,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639396955] [2024-11-08 19:08:26,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639396955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:26,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943739464] [2024-11-08 19:08:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 19:08:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:26,283 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:26,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 19:08:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:26,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 19:08:26,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 19:08:26,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 19:08:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943739464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:26,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:26,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 16 [2024-11-08 19:08:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259419988] [2024-11-08 19:08:26,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:26,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 19:08:26,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 19:08:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-08 19:08:26,649 INFO L87 Difference]: Start difference. First operand 284 states and 352 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:26,965 INFO L93 Difference]: Finished difference Result 366 states and 455 transitions. [2024-11-08 19:08:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 19:08:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-08 19:08:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:26,968 INFO L225 Difference]: With dead ends: 366 [2024-11-08 19:08:26,968 INFO L226 Difference]: Without dead ends: 362 [2024-11-08 19:08:26,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-11-08 19:08:26,970 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:26,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 175 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 19:08:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-08 19:08:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 339. [2024-11-08 19:08:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.2455621301775148) internal successors, (421), 338 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2024-11-08 19:08:27,151 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 34 [2024-11-08 19:08:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:27,152 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2024-11-08 19:08:27,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2024-11-08 19:08:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 19:08:27,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:27,153 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:27,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:27,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 19:08:27,354 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:27,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:27,354 INFO L85 PathProgramCache]: Analyzing trace with hash -471752366, now seen corresponding path program 5 times [2024-11-08 19:08:27,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:27,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146753637] [2024-11-08 19:08:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 19:08:28,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:28,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146753637] [2024-11-08 19:08:28,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146753637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:28,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113508850] [2024-11-08 19:08:28,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 19:08:28,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:28,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:28,311 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:28,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 19:08:28,418 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 19:08:28,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:28,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 19:08:28,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:29,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:08:30,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113508850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:30,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:30,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 37 [2024-11-08 19:08:30,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872917098] [2024-11-08 19:08:30,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:30,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 19:08:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 19:08:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 19:08:30,901 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:36,490 INFO L93 Difference]: Finished difference Result 510 states and 596 transitions. [2024-11-08 19:08:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 19:08:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-08 19:08:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:36,493 INFO L225 Difference]: With dead ends: 510 [2024-11-08 19:08:36,494 INFO L226 Difference]: Without dead ends: 479 [2024-11-08 19:08:36,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=814, Invalid=4016, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 19:08:36,496 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 162 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:36,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 167 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 19:08:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2024-11-08 19:08:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 351. [2024-11-08 19:08:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.237142857142857) internal successors, (433), 350 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 433 transitions. [2024-11-08 19:08:36,695 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 433 transitions. Word has length 34 [2024-11-08 19:08:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:36,696 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 433 transitions. [2024-11-08 19:08:36,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 433 transitions. [2024-11-08 19:08:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 19:08:36,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:36,697 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:36,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 19:08:36,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 19:08:36,906 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:36,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash -133664307, now seen corresponding path program 8 times [2024-11-08 19:08:36,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:36,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725338955] [2024-11-08 19:08:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:36,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 19:08:37,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725338955] [2024-11-08 19:08:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725338955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143158977] [2024-11-08 19:08:37,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:08:37,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:37,226 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:37,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 19:08:37,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:08:37,295 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:37,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 19:08:37,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 19:08:37,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 19:08:37,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143158977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:37,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:37,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-11-08 19:08:37,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803442159] [2024-11-08 19:08:37,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:37,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 19:08:37,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 19:08:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-11-08 19:08:37,886 INFO L87 Difference]: Start difference. First operand 351 states and 433 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:39,441 INFO L93 Difference]: Finished difference Result 635 states and 736 transitions. [2024-11-08 19:08:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 19:08:39,442 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-08 19:08:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:39,444 INFO L225 Difference]: With dead ends: 635 [2024-11-08 19:08:39,444 INFO L226 Difference]: Without dead ends: 610 [2024-11-08 19:08:39,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=632, Invalid=2448, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 19:08:39,446 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 287 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:39,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 276 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 19:08:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2024-11-08 19:08:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 366. [2024-11-08 19:08:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.2328767123287672) internal successors, (450), 365 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 450 transitions. [2024-11-08 19:08:39,612 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 450 transitions. Word has length 36 [2024-11-08 19:08:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:39,613 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 450 transitions. [2024-11-08 19:08:39,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 450 transitions. [2024-11-08 19:08:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 19:08:39,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:39,614 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:39,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 19:08:39,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 19:08:39,819 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:39,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2113980683, now seen corresponding path program 6 times [2024-11-08 19:08:39,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:39,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329140775] [2024-11-08 19:08:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:39,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:40,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:40,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329140775] [2024-11-08 19:08:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329140775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:40,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781943795] [2024-11-08 19:08:40,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 19:08:40,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:40,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:40,128 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 19:08:40,245 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-08 19:08:40,245 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:40,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 19:08:40,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:40,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 19:08:40,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781943795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:40,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:40,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 30 [2024-11-08 19:08:40,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166875509] [2024-11-08 19:08:40,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:40,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 19:08:40,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:40,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 19:08:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2024-11-08 19:08:40,850 INFO L87 Difference]: Start difference. First operand 366 states and 450 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:48,438 INFO L93 Difference]: Finished difference Result 1269 states and 1657 transitions. [2024-11-08 19:08:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-08 19:08:48,439 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 19:08:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:48,444 INFO L225 Difference]: With dead ends: 1269 [2024-11-08 19:08:48,444 INFO L226 Difference]: Without dead ends: 1234 [2024-11-08 19:08:48,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1451, Invalid=2971, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 19:08:48,448 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 1264 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:48,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 1077 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-08 19:08:48,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2024-11-08 19:08:48,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 423. [2024-11-08 19:08:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.2464454976303319) internal successors, (526), 422 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 526 transitions. [2024-11-08 19:08:48,731 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 526 transitions. Word has length 40 [2024-11-08 19:08:48,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:48,732 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 526 transitions. [2024-11-08 19:08:48,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 526 transitions. [2024-11-08 19:08:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 19:08:48,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:48,735 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:48,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 19:08:48,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:48,935 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:48,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -587838035, now seen corresponding path program 9 times [2024-11-08 19:08:48,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271806906] [2024-11-08 19:08:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:08:49,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:49,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271806906] [2024-11-08 19:08:49,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271806906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:49,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231553138] [2024-11-08 19:08:49,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 19:08:49,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:49,451 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:49,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 19:08:49,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-08 19:08:49,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:49,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 19:08:49,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:08:49,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:08:49,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231553138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:49,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:49,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 20 [2024-11-08 19:08:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001547667] [2024-11-08 19:08:49,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:49,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 19:08:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 19:08:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-08 19:08:49,979 INFO L87 Difference]: Start difference. First operand 423 states and 526 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:50,544 INFO L93 Difference]: Finished difference Result 521 states and 649 transitions. [2024-11-08 19:08:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 19:08:50,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 19:08:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:50,547 INFO L225 Difference]: With dead ends: 521 [2024-11-08 19:08:50,548 INFO L226 Difference]: Without dead ends: 517 [2024-11-08 19:08:50,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 15 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2024-11-08 19:08:50,552 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 79 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:50,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 250 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 19:08:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2024-11-08 19:08:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 487. [2024-11-08 19:08:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.2469135802469136) internal successors, (606), 486 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 606 transitions. [2024-11-08 19:08:50,757 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 606 transitions. Word has length 40 [2024-11-08 19:08:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:50,758 INFO L471 AbstractCegarLoop]: Abstraction has 487 states and 606 transitions. [2024-11-08 19:08:50,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 606 transitions. [2024-11-08 19:08:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 19:08:50,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:50,759 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:50,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:50,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:50,959 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:50,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1586651608, now seen corresponding path program 7 times [2024-11-08 19:08:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:50,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747335981] [2024-11-08 19:08:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:50,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 19:08:51,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:51,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747335981] [2024-11-08 19:08:51,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747335981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:51,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312043358] [2024-11-08 19:08:51,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 19:08:51,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:51,170 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:51,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 19:08:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:51,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-08 19:08:51,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 19:08:51,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-08 19:08:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312043358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:51,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2024-11-08 19:08:51,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815489815] [2024-11-08 19:08:51,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:51,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 19:08:51,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:51,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 19:08:51,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-08 19:08:51,493 INFO L87 Difference]: Start difference. First operand 487 states and 606 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:08:53,189 INFO L93 Difference]: Finished difference Result 727 states and 857 transitions. [2024-11-08 19:08:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-08 19:08:53,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 19:08:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:08:53,193 INFO L225 Difference]: With dead ends: 727 [2024-11-08 19:08:53,193 INFO L226 Difference]: Without dead ends: 599 [2024-11-08 19:08:53,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=1606, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 19:08:53,195 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 100 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 19:08:53,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 432 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 19:08:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2024-11-08 19:08:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 432. [2024-11-08 19:08:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.2389791183294663) internal successors, (534), 431 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 534 transitions. [2024-11-08 19:08:53,389 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 534 transitions. Word has length 42 [2024-11-08 19:08:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:08:53,389 INFO L471 AbstractCegarLoop]: Abstraction has 432 states and 534 transitions. [2024-11-08 19:08:53,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:08:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 534 transitions. [2024-11-08 19:08:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 19:08:53,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:08:53,391 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:08:53,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-08 19:08:53,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:53,596 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:08:53,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:08:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1119075246, now seen corresponding path program 10 times [2024-11-08 19:08:53,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:08:53,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265554865] [2024-11-08 19:08:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:08:53,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:08:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:08:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:08:53,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:08:53,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265554865] [2024-11-08 19:08:53,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265554865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:08:53,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834501251] [2024-11-08 19:08:53,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 19:08:53,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:08:53,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:08:53,897 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:08:53,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 19:08:53,967 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 19:08:53,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:08:53,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 19:08:53,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:08:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:08:54,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:08:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:08:54,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834501251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:08:54,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:08:54,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2024-11-08 19:08:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560089119] [2024-11-08 19:08:54,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:08:54,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 19:08:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:08:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 19:08:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-08 19:08:54,545 INFO L87 Difference]: Start difference. First operand 432 states and 534 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:09:08,715 INFO L93 Difference]: Finished difference Result 1067 states and 1231 transitions. [2024-11-08 19:09:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2024-11-08 19:09:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 19:09:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:09:08,720 INFO L225 Difference]: With dead ends: 1067 [2024-11-08 19:09:08,720 INFO L226 Difference]: Without dead ends: 970 [2024-11-08 19:09:08,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13115 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4739, Invalid=30793, Unknown=0, NotChecked=0, Total=35532 [2024-11-08 19:09:08,728 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 1439 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 19:09:08,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 617 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 19:09:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2024-11-08 19:09:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 440. [2024-11-08 19:09:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.2095671981776766) internal successors, (531), 439 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 531 transitions. [2024-11-08 19:09:09,020 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 531 transitions. Word has length 42 [2024-11-08 19:09:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:09:09,021 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 531 transitions. [2024-11-08 19:09:09,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 531 transitions. [2024-11-08 19:09:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 19:09:09,022 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:09:09,023 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:09:09,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 19:09:09,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:09:09,227 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:09:09,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:09:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1797282428, now seen corresponding path program 8 times [2024-11-08 19:09:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:09:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360733308] [2024-11-08 19:09:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:09:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:09:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:09:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 19:09:10,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:09:10,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360733308] [2024-11-08 19:09:10,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360733308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:09:10,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643170446] [2024-11-08 19:09:10,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:09:10,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:09:10,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:09:10,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:09:10,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 19:09:10,419 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:09:10,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:09:10,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-08 19:09:10,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:09:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:09:12,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:09:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:09:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643170446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:09:14,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:09:14,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 22] total 55 [2024-11-08 19:09:14,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445730196] [2024-11-08 19:09:14,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:09:14,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 19:09:14,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:09:14,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 19:09:14,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2422, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 19:09:14,618 INFO L87 Difference]: Start difference. First operand 440 states and 531 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:09:21,532 INFO L93 Difference]: Finished difference Result 562 states and 660 transitions. [2024-11-08 19:09:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-08 19:09:21,533 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 19:09:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:09:21,535 INFO L225 Difference]: With dead ends: 562 [2024-11-08 19:09:21,535 INFO L226 Difference]: Without dead ends: 525 [2024-11-08 19:09:21,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2692 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1634, Invalid=7296, Unknown=0, NotChecked=0, Total=8930 [2024-11-08 19:09:21,537 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 19:09:21,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 180 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 19:09:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-11-08 19:09:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 442. [2024-11-08 19:09:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.2108843537414966) internal successors, (534), 441 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 534 transitions. [2024-11-08 19:09:21,891 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 534 transitions. Word has length 42 [2024-11-08 19:09:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:09:21,892 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 534 transitions. [2024-11-08 19:09:21,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 55 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 534 transitions. [2024-11-08 19:09:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 19:09:21,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:09:21,893 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:09:21,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-08 19:09:22,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:09:22,094 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:09:22,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:09:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash 931494101, now seen corresponding path program 9 times [2024-11-08 19:09:22,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:09:22,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223568349] [2024-11-08 19:09:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:09:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:09:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:09:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 19:09:22,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:09:22,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223568349] [2024-11-08 19:09:22,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223568349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:09:22,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218975134] [2024-11-08 19:09:22,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 19:09:22,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:09:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:09:22,449 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:09:22,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 19:09:22,508 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 19:09:22,509 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:09:22,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 19:09:22,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:09:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-11-08 19:09:22,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:09:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-11-08 19:09:22,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218975134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:09:22,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:09:22,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 24 [2024-11-08 19:09:22,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584714057] [2024-11-08 19:09:22,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:09:22,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 19:09:22,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:09:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 19:09:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2024-11-08 19:09:22,816 INFO L87 Difference]: Start difference. First operand 442 states and 534 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:09:26,046 INFO L93 Difference]: Finished difference Result 694 states and 847 transitions. [2024-11-08 19:09:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-08 19:09:26,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-08 19:09:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:09:26,050 INFO L225 Difference]: With dead ends: 694 [2024-11-08 19:09:26,050 INFO L226 Difference]: Without dead ends: 589 [2024-11-08 19:09:26,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=393, Invalid=5009, Unknown=0, NotChecked=0, Total=5402 [2024-11-08 19:09:26,052 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 238 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 19:09:26,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1023 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 19:09:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2024-11-08 19:09:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 409. [2024-11-08 19:09:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.1936274509803921) internal successors, (487), 408 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 487 transitions. [2024-11-08 19:09:26,271 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 487 transitions. Word has length 44 [2024-11-08 19:09:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:09:26,271 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 487 transitions. [2024-11-08 19:09:26,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 487 transitions. [2024-11-08 19:09:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 19:09:26,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:09:26,273 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:09:26,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-08 19:09:26,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-08 19:09:26,478 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:09:26,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:09:26,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1022715086, now seen corresponding path program 11 times [2024-11-08 19:09:26,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:09:26,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426492394] [2024-11-08 19:09:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:09:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:09:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:09:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 19:09:27,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:09:27,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426492394] [2024-11-08 19:09:27,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426492394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:09:27,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264882357] [2024-11-08 19:09:27,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 19:09:27,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:09:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:09:27,187 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:09:27,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 19:09:27,330 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-08 19:09:27,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:09:27,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-08 19:09:27,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:09:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 19:09:27,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:09:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 19:09:27,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264882357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:09:27,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:09:27,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 24 [2024-11-08 19:09:27,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273365842] [2024-11-08 19:09:27,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:09:27,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 19:09:27,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:09:27,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 19:09:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-11-08 19:09:27,860 INFO L87 Difference]: Start difference. First operand 409 states and 487 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:09:28,489 INFO L93 Difference]: Finished difference Result 505 states and 605 transitions. [2024-11-08 19:09:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 19:09:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 19:09:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:09:28,492 INFO L225 Difference]: With dead ends: 505 [2024-11-08 19:09:28,492 INFO L226 Difference]: Without dead ends: 501 [2024-11-08 19:09:28,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2024-11-08 19:09:28,493 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 102 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 19:09:28,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 353 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 19:09:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2024-11-08 19:09:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 465. [2024-11-08 19:09:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.1939655172413792) internal successors, (554), 464 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 554 transitions. [2024-11-08 19:09:28,864 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 554 transitions. Word has length 46 [2024-11-08 19:09:28,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:09:28,865 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 554 transitions. [2024-11-08 19:09:28,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 554 transitions. [2024-11-08 19:09:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 19:09:28,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:09:28,867 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:09:28,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-08 19:09:29,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-08 19:09:29,072 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:09:29,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:09:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1861199337, now seen corresponding path program 12 times [2024-11-08 19:09:29,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:09:29,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717725402] [2024-11-08 19:09:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:09:29,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:09:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:09:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 13 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 19:09:29,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:09:29,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717725402] [2024-11-08 19:09:29,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717725402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:09:29,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035556696] [2024-11-08 19:09:29,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 19:09:29,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:09:29,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:09:29,428 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:09:29,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 19:09:29,563 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-08 19:09:29,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:09:29,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 19:09:29,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:09:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 19:09:29,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:09:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 19:09:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035556696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:09:30,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:09:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2024-11-08 19:09:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466083796] [2024-11-08 19:09:30,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:09:30,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 19:09:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:09:30,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 19:09:30,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 19:09:30,394 INFO L87 Difference]: Start difference. First operand 465 states and 554 transitions. Second operand has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:09:34,759 INFO L93 Difference]: Finished difference Result 818 states and 940 transitions. [2024-11-08 19:09:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-11-08 19:09:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-08 19:09:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:09:34,768 INFO L225 Difference]: With dead ends: 818 [2024-11-08 19:09:34,768 INFO L226 Difference]: Without dead ends: 781 [2024-11-08 19:09:34,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2304, Invalid=10128, Unknown=0, NotChecked=0, Total=12432 [2024-11-08 19:09:34,775 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 609 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 19:09:34,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 639 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 19:09:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2024-11-08 19:09:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 481. [2024-11-08 19:09:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.19375) internal successors, (573), 480 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 573 transitions. [2024-11-08 19:09:35,150 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 573 transitions. Word has length 48 [2024-11-08 19:09:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:09:35,150 INFO L471 AbstractCegarLoop]: Abstraction has 481 states and 573 transitions. [2024-11-08 19:09:35,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:09:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 573 transitions. [2024-11-08 19:09:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 19:09:35,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:09:35,151 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:09:35,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-08 19:09:35,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-08 19:09:35,352 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:09:35,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:09:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1508916580, now seen corresponding path program 10 times [2024-11-08 19:09:35,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:09:35,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503062012] [2024-11-08 19:09:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:09:35,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:09:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:09:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 19:09:35,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:09:35,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503062012] [2024-11-08 19:09:35,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503062012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:09:35,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459563717] [2024-11-08 19:09:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 19:09:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:09:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:09:35,788 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:09:35,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 19:09:35,890 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 19:09:35,890 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:09:35,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 19:09:35,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:09:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 19:09:35,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:09:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 19:09:36,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459563717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:09:36,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:09:36,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2024-11-08 19:09:36,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095645053] [2024-11-08 19:09:36,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:09:36,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 19:09:36,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:09:36,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 19:09:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1170, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 19:09:36,804 INFO L87 Difference]: Start difference. First operand 481 states and 573 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:10:17,499 INFO L93 Difference]: Finished difference Result 1913 states and 2364 transitions. [2024-11-08 19:10:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2024-11-08 19:10:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-08 19:10:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:10:17,502 INFO L225 Difference]: With dead ends: 1913 [2024-11-08 19:10:17,502 INFO L226 Difference]: Without dead ends: 1796 [2024-11-08 19:10:17,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21734 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=12097, Invalid=40573, Unknown=0, NotChecked=0, Total=52670 [2024-11-08 19:10:17,507 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 3301 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 1007 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3301 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 3683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1007 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-08 19:10:17,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3301 Valid, 1608 Invalid, 3683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1007 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-08 19:10:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2024-11-08 19:10:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 548. [2024-11-08 19:10:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.206581352833638) internal successors, (660), 547 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 660 transitions. [2024-11-08 19:10:17,901 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 660 transitions. Word has length 50 [2024-11-08 19:10:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:10:17,902 INFO L471 AbstractCegarLoop]: Abstraction has 548 states and 660 transitions. [2024-11-08 19:10:17,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 660 transitions. [2024-11-08 19:10:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 19:10:17,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:10:17,904 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:10:17,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-08 19:10:18,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-08 19:10:18,104 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:10:18,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:10:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1151363290, now seen corresponding path program 11 times [2024-11-08 19:10:18,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:10:18,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906812557] [2024-11-08 19:10:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:10:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:10:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:10:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 19:10:19,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:10:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906812557] [2024-11-08 19:10:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906812557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:10:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781349904] [2024-11-08 19:10:19,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 19:10:19,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:10:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:10:19,493 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:10:19,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 19:10:19,629 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 19:10:19,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:10:19,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-08 19:10:19,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:10:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 19:10:21,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:10:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 19:10:23,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781349904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:10:23,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:10:23,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 16] total 51 [2024-11-08 19:10:23,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344214893] [2024-11-08 19:10:23,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:10:23,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 19:10:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:10:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 19:10:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 19:10:23,205 INFO L87 Difference]: Start difference. First operand 548 states and 660 transitions. Second operand has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:10:27,929 INFO L93 Difference]: Finished difference Result 694 states and 808 transitions. [2024-11-08 19:10:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 19:10:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-08 19:10:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:10:27,932 INFO L225 Difference]: With dead ends: 694 [2024-11-08 19:10:27,933 INFO L226 Difference]: Without dead ends: 652 [2024-11-08 19:10:27,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=595, Invalid=3065, Unknown=0, NotChecked=0, Total=3660 [2024-11-08 19:10:27,934 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-08 19:10:27,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 237 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-08 19:10:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2024-11-08 19:10:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 536. [2024-11-08 19:10:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.2093457943925234) internal successors, (647), 535 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 647 transitions. [2024-11-08 19:10:28,260 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 647 transitions. Word has length 50 [2024-11-08 19:10:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:10:28,260 INFO L471 AbstractCegarLoop]: Abstraction has 536 states and 647 transitions. [2024-11-08 19:10:28,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 647 transitions. [2024-11-08 19:10:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-08 19:10:28,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:10:28,261 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:10:28,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-08 19:10:28,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-08 19:10:28,462 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:10:28,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:10:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2076453879, now seen corresponding path program 13 times [2024-11-08 19:10:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:10:28,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775139364] [2024-11-08 19:10:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:10:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:10:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:10:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-08 19:10:29,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:10:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775139364] [2024-11-08 19:10:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775139364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:10:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889296903] [2024-11-08 19:10:29,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 19:10:29,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:10:29,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:10:29,231 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:10:29,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 19:10:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:10:29,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 19:10:29,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:10:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-08 19:10:29,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:10:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-08 19:10:29,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889296903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:10:29,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:10:29,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 28 [2024-11-08 19:10:29,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67170776] [2024-11-08 19:10:29,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:10:29,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 19:10:29,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:10:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 19:10:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-11-08 19:10:29,846 INFO L87 Difference]: Start difference. First operand 536 states and 647 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:10:30,666 INFO L93 Difference]: Finished difference Result 660 states and 804 transitions. [2024-11-08 19:10:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 19:10:30,667 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-08 19:10:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:10:30,669 INFO L225 Difference]: With dead ends: 660 [2024-11-08 19:10:30,670 INFO L226 Difference]: Without dead ends: 656 [2024-11-08 19:10:30,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 19 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2024-11-08 19:10:30,671 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 19:10:30,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 376 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 19:10:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2024-11-08 19:10:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 615. [2024-11-08 19:10:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.214983713355049) internal successors, (746), 614 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 746 transitions. [2024-11-08 19:10:31,023 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 746 transitions. Word has length 52 [2024-11-08 19:10:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:10:31,023 INFO L471 AbstractCegarLoop]: Abstraction has 615 states and 746 transitions. [2024-11-08 19:10:31,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 746 transitions. [2024-11-08 19:10:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 19:10:31,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:10:31,025 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:10:31,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-08 19:10:31,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 19:10:31,225 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:10:31,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:10:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -196705508, now seen corresponding path program 14 times [2024-11-08 19:10:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:10:31,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911696677] [2024-11-08 19:10:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:10:31,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:10:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:10:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 15 proven. 98 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-08 19:10:31,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:10:31,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911696677] [2024-11-08 19:10:31,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911696677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:10:31,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46060137] [2024-11-08 19:10:31,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 19:10:31,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:10:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:10:31,695 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:10:31,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-08 19:10:31,773 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 19:10:31,773 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 19:10:31,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 19:10:31,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 19:10:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 15 proven. 98 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-08 19:10:32,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 19:10:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 15 proven. 98 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-08 19:10:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46060137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 19:10:32,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 19:10:32,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-11-08 19:10:32,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989185112] [2024-11-08 19:10:32,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 19:10:32,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-08 19:10:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 19:10:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-08 19:10:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 19:10:32,870 INFO L87 Difference]: Start difference. First operand 615 states and 746 transitions. Second operand has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 19:10:39,708 INFO L93 Difference]: Finished difference Result 1143 states and 1315 transitions. [2024-11-08 19:10:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-08 19:10:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-08 19:10:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 19:10:39,711 INFO L225 Difference]: With dead ends: 1143 [2024-11-08 19:10:39,711 INFO L226 Difference]: Without dead ends: 1100 [2024-11-08 19:10:39,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5989 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3446, Invalid=15186, Unknown=0, NotChecked=0, Total=18632 [2024-11-08 19:10:39,713 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 742 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 19:10:39,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 742 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 19:10:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2024-11-08 19:10:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 656. [2024-11-08 19:10:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.2106870229007634) internal successors, (793), 655 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 793 transitions. [2024-11-08 19:10:40,101 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 793 transitions. Word has length 54 [2024-11-08 19:10:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 19:10:40,102 INFO L471 AbstractCegarLoop]: Abstraction has 656 states and 793 transitions. [2024-11-08 19:10:40,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 19:10:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 793 transitions. [2024-11-08 19:10:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 19:10:40,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 19:10:40,103 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 19:10:40,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-08 19:10:40,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:10:40,303 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 19:10:40,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 19:10:40,304 INFO L85 PathProgramCache]: Analyzing trace with hash -918776050, now seen corresponding path program 12 times [2024-11-08 19:10:40,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 19:10:40,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970296523] [2024-11-08 19:10:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 19:10:40,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 19:10:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 19:10:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 19:10:40,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 19:10:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970296523] [2024-11-08 19:10:40,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970296523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 19:10:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253325964] [2024-11-08 19:10:40,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 19:10:40,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 19:10:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 19:10:40,818 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 19:10:40,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f97956c-4720-4e81-a7f0-f1b352133b75/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process